Apparatus for grinding surface of steel sheet

ABSTRACT

The present invention relates to an apparatus for grinding a surface of a steel sheet, the apparatus comprising: a conveyor for transferring a steel sheet; and a grinding means, which is coupled above the conveyor such that the grinding means can be rotated about a direction perpendicular to the conveyor as an axis, and which grinds the surface of the steel sheet, wherein the angle at which the steel sheet is ground is adjusted by rotation. Through the above configuration, as the grinding means is rotatably coupled to the conveyor, it is possible to grind various patterns on the surface of the steel sheet by adjusting the grinding angle through the rotation of the grinding means.

TECHNICAL FIELD

The present invention relates to a surface polishing device for steel sheets, and more particularly, to a surface polishing device for steel sheets used for polishing the surface of a steel sheet.

BACKGROUND ART

Forming a scratch pattern, like hairlines, on the surface of a metal plate, e.g., a stainless steel plate, may provide a gorgeous decorative effect while maintaining the inherent luster of the metal and may also achieve anti-fingerprint effects. As such, hairline finishing is widely used as a surface processing method for stainless steel or other metal plates.

In general, conventional devices for forming hairlines on metal plates form hairlines by rotating or reciprocating a sandpaper-wrapped polishing belt or pad on a steel plate continuously uncoiled or a steel sheet cut to a predetermined length along the feeding or conveying direction of the coiled steel plate or sheet to thereby make scratches. The conventional hairline finishing devices form hairlines along the length direction of the coiled steel plate or the steel sheet cut to a predetermined length and have difficulty in forming hairlines along the horizontal direction of the coiled steel plate or steel sheet.

Therefore, conventionally, products with a hairline pattern in the length direction of the coil or sheet are mainly supplied, and there is no compact, efficient device for automatically forming a hairline pattern in the horizontal direction of the coiled steel plate or steel sheet.

In particular, there is no known efficient, compact device capable of forming hairlines in the horizontal direction for both metal plates continuously uncoiled from coiled steel plates and steel sheets cut to a predetermined length. Therefore, conventional hairline-finished products mostly have hairlines in the length direction but there are no products with hairlines in the horizontal direction which may give a novel, aesthetic feeling.

The conventional hairline forming device typically includes one device unit and one polishing belt or polishing pad. Thus, to form mixed hairlines, which include multiple types of hairlines with different thicknesses, on a single metal plate, multiple hairline forming devices are required, which may cause a complicated device configuration and an increase in space occupation.

Prior technical documents in the art to which the present invention pertains include Korean Patent Nos. 10-1007517, 10-1510556, and 10-1101802.

DETAILED DESCRIPTION OF THE INVENTION Technical Problems

The present invention has been devised to address the foregoing issues and aims to polish to have various patterns through a minimal headline device while reducing the size and costs of the device.

Means to Address the Problems

To achieve the foregoing objectives, according to a preferred embodiment of the present invention, a steel plate surface polishing device comprises a conveyor transferring a steel plate; and a polishing means positioned over and coupled to the conveyor to be rotatable around an axis along a direction perpendicular to the conveyor, polishing a surface the steel plate, and adjusting a polishing angle of the steel plate according to rotation.

Further, a guide rail is coupled to an upper end of the conveyor to guide a moving roller coupled to an end of the polishing means and to fix a rotation angle of the polishing means.

Further, the guide rail guides the polishing means to be rotated at an angle ranging from 0 degrees to 45 degrees from a direction perpendicular to a transfer direction of the conveyor.

Further, a plurality of the polishing means are disposed to be symmetrical with each other in a front/rear direction.

Further, a driving roller driven by a driving motor is coupled to one side of the polishing means. A horizontal roller positioned in line with the driving roller to be movable in a transverse direction is coupled. A vertical roller is coupled over and between the driving roller and the horizontal roller to be movable in a longitudinal direction. A polishing belt is coupled integrally to the driving roller, the horizontal roller, and the vertical roller. A length of a lowermost end of the polishing belt is adjusted as the horizontal roller and the vertical roller are moved in the transverse direction and the longitudinal direction and the length of the lowermost end is adjusted as the polishing means is rotated.

Effects of the Invention

According to the steel plate surface polishing device of the present invention, it is possible to form various patterns on the surface of a steel plate by adjusting the polishing angle through rotation of the polishing means rotatably coupled to the conveyor.

In particular, various patterns may be formed by adjusting the angle of a single polishing means, so that it is possible to simplify and downsize the equipment to save costs.

Further, polishing means symmetrical to each other may be provided to enable polishing in further diversified patterns.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating a steel plate surface polishing device according to a first embodiment of the present invention.

FIG. 2 is a front view of FIG. 1 according to the first embodiment of the present invention.

FIGS. 3 and 4 are views illustrating a polishing means according to the first embodiment of the present invention.

FIG. 5 is a front view illustrating a steel plate surface polishing device according to a second embodiment of the present invention.

FIG. 6 is a side cross-sectional view illustrating a horizontal roller according to the second embodiment of the present invention.

FIG. 7 is a front view illustrating the horizontal roller according to the second embodiment of the present invention.

FIG. 8 is a side cross-sectional view illustrating a vertical roller according to the second embodiment of the present invention.

FIG. 9 is a front view illustrating the vertical roller according to the second embodiment of the present invention.

FIG. 10 is a view illustrating operations of the horizontal roller and the vertical roller according to a second embodiment of the present invention.

MODE TO PRACTICE THE INVENTION

Advantages and features of the present invention, and methods for achieving the same may be apparent from the embodiments described below with reference to the accompanying drawings.

However, the present disclosure is not limited to the embodiments disclosed herein, and various changes may be made thereto. The embodiments disclosed herein are provided only to inform one of ordinary skilled in the art of the category of the present disclosure. The present disclosure is defined only by the appended claims. The same reference numeral denotes the same element throughout the specification.

Hereinafter, the present invention is described with reference to the drawings for describing a steel plate surface polishing device according to embodiments of the present invention.

FIG. 1 is a perspective view illustrating a steel plate surface polishing device according to a first embodiment of the present invention. FIG. 2 is a front view of FIG. 1 according to the first embodiment of the present invention. FIGS. 3 and 4 are views illustrating a polishing means according to the first embodiment of the present invention.

Referring to these drawings, the steel plate surface polishing device according to the present embodiment is able to finish the steel plate surface to have various patterns even with a simple process.

The steel plate surface polishing device 100 according to the present embodiment that may provide such an effect includes a conveyor 110 and a polishing means 120.

The conveyor 110 transfers a steel plate 10 and includes a body 111 installed on the ground.

A transfer belt 113 driven by a transfer motor 112 is coupled to an upper center of the body 111.

It is preferable that the transfer belt 113 is positioned higher than the top surface of the body 111.

This is to prevent the top surface of the body 111 from interfering with the polishing means 120 when the steel plate 10 transferred by the transfer belt 113 is polished by the polishing means 120 to be described below.

A guide rail 114 which is curved from one side, as a reference point, of the transfer belt 113 to the other side is coupled to the top end of the body 111.

In this case, the guide rail 114 is curved by about 45 degrees forward along the direction perpendicular to the transfer direction of the transfer belt 113.

The polishing means 120 is installed over the conveyor 110 to polish the surface of the steel plate 10 transferred by the transfer belt 113. The polishing means 120 includes a rotation shaft 121 coupled to a reference point of the body 111 and a polishing plate 122 coupled to a side of the rotation shaft 121.

Specifically, the rotation shaft 121 is rotatably coupled to the reference point of the body 111.

The polishing plate 122 has one side rotatably and integrally coupled to the rotation shaft 121 and the other side extending to the other side of the transfer belt 113.

A moving roller 123 guided along the guide rail 114 is coupled to a lower portion of the other end of the polishing plate 122.

The polishing plate 122 is rotated by about 45 degrees from the direction perpendicular to the transfer direction of the transfer belt 113, along the guide rail 114, by the moving roller 123.

The moving roller 123 has a brake (not shown) and may fix the rotation angle of the polishing plate 122.

A driving motor M is coupled to one side of the rear of the polishing plate 122, and a sub roller R connected with the driving motor M by a driving belt B is coupled to a lower end of the one side of the rear.

A driving roller 125 connected with the sub roller R to be integrally driven is coupled to a lower end of the one side of the front of the polishing plate 122.

A horizontal roller 126 disposed in line with the driving roller 125 is rotatably coupled to a lower end of the other side of the front of the polishing plate 122.

A vertical roller 127 disposed over and between the driving roller 125 and the horizontal roller 126, is rotatably coupled to the front of the polishing plate 122.

In this case, the driving roller 125, the horizontal roller 126, and the vertical roller 127 are disposed in a substantially triangular shape.

One polishing belt 128 is coupled to integrally surround the driving roller 125, the horizontal roller 126, and the vertical roller 127.

The polishing belt 128 is rotated together with the horizontal roller 126 and the vertical roller 127 to polish the steel plate 10 according to the driving of the driving roller 125.

In this case, a pressing roller 124 is rotatably coupled to the frontmost lower end of the polishing plate 122 to press the steel plate 10.

The pressing roller 124 presses and fixes the steel plate 10 to prevent the steel plate 10 from being shaken by the polishing belt 128 while being polished.

Thus, the polishing means 120 may form hairlines in a diagonal direction between 0 degrees and 45 degrees, as well as hairlines in the horizontal direction, on the steel plate 10 through rotation.

Further, the driving roller 125, the horizontal roller 126, and the vertical roller 127 may be formed in duplicate. The polishing belt 128 may also be coupled in duplicate.

Further, the polishing means 120 may be installed at the front and rear, respectively, of the conveyor 110 and be symmetrical to each other to polish the steel plate 10 substantially in an “x” shape when rotated at 45 degrees therebetween.

FIG. 5 is a front view illustrating a steel plate surface polishing device according to a second embodiment of the present invention. FIG. 6 is a side cross-sectional view illustrating a horizontal roller according to the second embodiment of the present invention. FIG. 7 is a front view illustrating the horizontal roller according to the second embodiment of the present invention. FIG. 8 is a side cross-sectional view illustrating a vertical roller according to the second embodiment of the present invention. FIG. 9 is a front view illustrating the vertical roller according to the second embodiment of the present invention. FIG. 10 is a view illustrating operations of the horizontal roller and the vertical roller according to a second embodiment of the present invention.

The steel plate surface polishing device 200 according to the present embodiment includes a conveyor 110 and a polishing means 220.

The conveyor 110 transfers a steel plate 10 and includes a body 111 installed on the ground.

A transfer belt 113 driven by a transfer motor 112 is coupled to an upper center of the body 111.

The polishing means 220 is installed over the conveyor 110 to polish the surface of the steel plate 10 transferred by the transfer belt 113. The polishing means 120 includes a rotation shaft 221 coupled to a reference point of the body 111 and a polishing plate 222 coupled to a side of the rotation shaft 221.

A driving motor M is coupled to one side of the rear of the polishing plate 222, and a sub roller R connected with the driving motor M by a driving belt B is coupled to a lower end of the one side of the rear.

A driving roller 225 connected with the sub roller R to be integrally driven is coupled to a lower end of the one side of the front of the polishing plate 222.

A horizontal roller 226 disposed in line with the driving roller 225 is coupled to a lower end of the other side of the front of the polishing plate 222, rotatably and movably in the traverse direction.

A vertical roller 227 disposed over and between the driving roller 225 and the horizontal roller 226, is coupled to the front of the polishing plate 222, rotatably and movably in the longitudinal direction.

In this case, the driving roller 225, the horizontal roller 226, and the vertical roller 227 are disposed in a substantially triangular shape.

One abrasive belt 228 is coupled to integrally surround the driving roller 225, the horizontal roller 226, and the vertical roller 227.

The polishing belt 228 is rotated together with the horizontal roller 226 and the vertical roller 227 to polish the steel plate 10 according to the driving of the driving roller 225.

In this case, a pressing roller 224 is rotatably coupled to the frontmost lower end of the polishing plate 222 to press the steel plate 10.

The pressing roller 224 presses and fixes the steel plate 10 to prevent the steel plate 10 from being shaken by the polishing belt 228 while being polished.

Meanwhile, the horizontal roller 226 and the vertical roller 227 may be movably coupled to the polishing plate 222 and be fixed in a moved position and, as moved, be able to adjust the lowermost length of the polishing belt 228.

Specifically, a first long hole 222 a is formed, in the transverse direction, in the lower end of the other side of the front of the polishing plate 222, and a first moving member 226 a is movably coupled to the first long hole 222 a.

The horizontal roller 226 is rotatably coupled to the front of the first moving member 226 a.

Further, first guide wings 226 b extending in the upper and lower directions of the first long hole 222 a are formed in the first moving member 226 a in the front/rear direction of the polishing plate 222.

Here, a first fixing bolt 126 c for fixing the position of the first moving member 226 a is fastened to the first guide wing 226 b positioned in front of the polishing plate 222 among the first guide wings 226 b.

In this case, an end of the first fixing bolt 126 c presses the front of the polishing plate 222 to fix the first moving member 226 a according to the degree of fastening.

A second long hole 222 b is formed, in the longitudinal direction, in the upper center of the front of the polishing plate 222, and a second moving member 227 a is movably coupled to the second long hole 222 b.

The vertical roller 227 is rotatably coupled to the front of the second moving member 227 a.

Further, second guide wings 227 b extending in two lateral directions of the second long hole 222 b are formed in the second moving member 227 a in the front/rear direction of the polishing plate 222.

Here, a second fixing bolt 127 c for fixing the position of the second moving member 227 a is fastened to the second guide wing 227 b positioned in front of the polishing plate 222 among the second guide wings 227 b.

In this case, an end of the second fixing bolt 127 c presses the front of the polishing plate 222 to fix the second moving member 227 a according to the degree of fastening.

Accordingly, the positions of the horizontal roller 226 and the vertical roller 227 may be adjusted.

Meanwhile, the length of the lowermost end of the polishing belt 228 is adjusted according to the positions of the horizontal roller 226 and the vertical roller 227.

Specifically, the length of the lowermost end of the polishing belt 228 is reduced when the horizontal roller 226 moves in one lateral direction and increased when the horizontal roller 226 moves in the opposite lateral direction.

In this case, the vertical roller 227 is moved upward, when the horizontal roller 226 moves in the one lateral direction, and moved downward when moving in the opposite direction so as to constantly maintain the tension of the polishing belt 228 according to the upper/lower movements.

Here, since the contact surface of the polishing belt 228 with the steel plate 10 varies depending on the rotation angle of the polishing means, the length of the lowermost end thereof is preferably adjusted to correspond thereto.

For example, when the rotation angle of the polishing means 220 is 45 degrees, the polishing means 220 is positioned in an oblique direction with respect to the transfer belt 113, so that the area of contact with the transfer belt 113 is larger than that when the polishing means 220 is at a rotation angle of 0 degrees.

Therefore, it is preferable to adjust the length of the lowermost end of the polishing belt 228 according to the rotation angle of the polishing means 220 so that the area in contact with the transfer belt 113 is the same.

Here, when the polishing means 220 is positioned in a direction perpendicular to the transfer belt 113, the rotation angle is 0 degrees, and the area of contact with the polishing belt 228 is relatively short.

Accordingly, the polishing belt 228 provides an optimal polishing area by adjusting the length of the lowermost end through the horizontal roller 226 and the vertical roller 227 according to the rotation angle of the polishing means 220.

By such a configuration, the polishing means 220 may form hairlines in a diagonal direction between 0 degrees and 45 degrees, as well as hairlines in the horizontal direction, on the steel plate 10 according to the rotation.

According to the steel plate surface polishing device of the present invention, it is possible to form various patterns on the surface of a steel plate by adjusting the polishing angle through rotation of the polishing means rotatably coupled to the conveyor.

In particular, various patterns may be formed by adjusting the angle of a single polishing means, so that it is possible to simplify and downsize the equipment to save costs.

Further, polishing means symmetrical to each other may be provided to enable polishing in further diversified patterns.

It will be appreciated by one of ordinary skill in the art that the present disclosure may be implemented in other various specific forms without changing the essence or technical spirit of the present disclosure. Thus, it should be noted that the above-described embodiments are provided as examples and should not be interpreted as limiting. It should be noted that the scope of the present invention is defined by the appended claims rather than the described description of the embodiments and include all modifications or changes made to the claims or equivalents of the claims.

*LEGEND OF REFERENCE NUMBERS*

-   100: polishing device 110: conveyor -   111: body 112: transfer motor -   113: transfer belt 114: guide rail -   120: polishing means 121: rotation shaft -   122: polishing plate 123: moving roller -   124: pressing roller 125: driving roller -   126: horizontal roller 127: vertical roller -   128: polishing belt 

1. A steel plate surface polishing device, comprising: a conveyor transferring a steel plate; and a polishing means positioned over and coupled to the conveyor to be rotatable around an axis along a direction perpendicular to the conveyor, polishing a surface the steel plate, and adjusting a polishing angle of the steel plate according to rotation.
 2. The steel plate surface polishing device of claim 1, wherein a guide rail is coupled to an upper end of the conveyor to guide a moving roller coupled to an end of the polishing means and to fix a rotation angle of the polishing means.
 3. The steel plate surface polishing device of claim 2, wherein the guide rail guides the polishing means to be rotated at an angle ranging from 0 degrees to 45 degrees from a direction perpendicular to a transfer direction of the conveyor.
 4. The steel plate surface polishing device of claim 3, wherein a plurality of the polishing means are disposed to be symmetrical with each other in a front/rear direction.
 5. The steel plate surface polishing device of claim 3, wherein a driving roller driven by a driving motor is coupled to one side of the polishing means, wherein a horizontal roller positioned in line with the driving roller to be movable in a transverse direction is coupled, wherein a vertical roller is coupled over and between the driving roller and the horizontal roller to be movable in a longitudinal direction, wherein a polishing belt is coupled integrally to the driving roller, the horizontal roller, and the vertical roller, wherein a length of a lowermost end of the polishing belt is adjusted as the horizontal roller and the vertical roller are moved in the transverse direction and the longitudinal direction and the length of the lowermost end is adjusted as the polishing means is rotated. 